I was dueling laxs he shoveled me I was about to suplex and win but I pinged my internet was fine it was just that one game I pinged he claims I force pinged but I didn't he rigged me out of 4.5k and i pinged but no one was on my internet but me and i was fine all my games before

You're going to have to do 2 things.
1. get proof
2. post in scam reports

proof how do I get proof of a boot

You get screenshots? And as Slaya said, if this is a scam as you say then you should probably post this in scam reports.

You can use Gyazo. Its a easy and simple way to take quick screen shots by clicking and dragging where you want it to take the screen shot then it will bring you to your browser containing your screen shot!

it cant be a ddos because theres no way he can get your ip since he's not a staff member and you cant do /status either so ye. faulty internet i should say.